Locomotive valve-gear.



A. JENDRUSIK.

. LOGOMOTIVE VALVE GEAR.

APPLICATION FILED MAY 27, 1900.

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Patented Apr.25, 1911.

A. J-ENDRUSIK.

LOCOMOTIVE VALVE GEAR.

APPLICATION nun 11.111111, 1109,

990,656. Patented Apr.25, 1911.

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A. JENDRUSIK.

LOOOMOTIVE VALVE GEAR.

APPLIOATIOI FILED IA! 27, 1909.

Patented Apr. 25, 1911'.

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UNITED STATES PATENT OFFICE.

AURELIJUSZ JENDRUSIK, OF STRZOMIESZYGE, RUSSIA.

LOGOMOTIVE VALVE-GEAR.

T 0 all whom it may concern:

Be it known that I, AURn IJUsz J ENDRUSIK, a subject of the Czar of Russia, and residing at Strzomieszyce, Russian Poland, Empire of Russia, have invented certain new and useful Improvements in Locomotive Valve- Gear, of which the following is a specification.

My invention relates to locomotive valve gears, with which it is possible, when running without steam, and for the purpose of suppressing the compression and expansion and protecting the steam-distributing members, to' stop the slide valve and place it in such manner that the cylinder ports are per manently connected with one another and with the exhaust. The known valve gears which answer this purpose are made on the lines of the best known locomotive link motions, necessitate however a substantial alteration of the same, particularly a displacement of the main link driven by the eccentric, it being necessary to provide a movable bearing for the pivot of the main link around which it rocks.

Now a primary object of my invention is to remedy these disadvantages.

In order that my invention may be clearly understood I will now explain the same with reference to the accompanying drawings in which several embodiments are represented by way of example.

In said drawings :-Figure 1 is an elevation, partly in section and having parts broken away, showing one constructional form of my invention as applied to a Joy.

link motion, and Fig. 2 is a diagram showing the same as in Fig. 1 but with the link moved so that the slide valve remains stationary; Figs. 3 and 4 are diagrams showing a form of my invention applied to a I-Ieusinger link motion, Whereas Fig. 5 is a somewhat modified form of the invention in connection with a Heusinger link motion, and Fig. 6 is a horizontal section through the essential part of the constructional form of the invention represented in Fig. 1.

Referring to the drawings and firstly par ticularly to Figs. 1, 2 and 6, the Joy link motion has a revoluble main link 1, whose guide block has imparted to it by the lever 2 a combined motion from the eccentric and from the coupling bar. This lever 2 is connected with the slide valve rod 1 by the piv- Specification of Letters Patent.

Application filed May 27, 1909.

Patented Apr; 25, 1911.

Serial No. 498,605.

oted rod 3. According as the link 1 is slanted more or less, the slide valve 5 moves more or less, more or less steam being admitted to the cylinder. Now according to my inven tion I attach the rod 3 to the one end 6 of an auxiliary link 7, Whereas I preferably suspend the other end 8 of the auxiliary link'to tions imparted to it by the rod 3 and wil1- rock around the point 8. Since the guide block 10 (Fig. 6) coincides with the point 6, the valve rod 4 will also move in the same manner as the rod 3 and the slide valve will open and close the cylinder ports in the usual manner. But as soon as the link 7 is moved into the position shown in Fig. 2, the stationary point 8 of the link coincides with the guide block of the valve rod so that the latter does not move at all, whereas the point 6 can rock freely around the point 8. In order to diminish these rocking movements as much as possible it is preferable to place the main link 1 at zero admission. As is evident, the point 8 of the link 7 is suspended in such manner that when the link is moved this point moves to the right, whereupon the slide-valve takes up the position shown in Fig. 2 in which the cylinder ports are connected with one another and with the ex haust.

It is true that the Heusinger link motion illustrated in Figs. 3 to 5 difiers very materially from the Joy link motion, nevertheless the auxiliary device according to my present invention shown here perfectly cor responds with that employed in the Joy link motion. The upper end of the rod 15 is not connected directly with the valve rod, but is attached by means of bolts to the lower end of the link 7. Again, the other end of link is suspended from the bent lever 9, whereas the guide block of the link is connected with the valve rod. In the position of the link represented in Fig. 3 the manner in which the I-Ieusinger link motion normally operates is not altered in the least and also the motion of the same is imparted without alteration to the slide valve. But as soon as the link 7 takes up the position shown in Fig. 1 the slide valve remains at rest and is placed back so far that the cylinder ports are continuously connected with one another and with the exhaust.

As will be readily understood from Fig. 4L, in the position of the link 7 there shown the rods 15, 16 and 17 must be brought out of the position shown in Fig. 3. In order to avoid this, therefore, as is evident from F ig. 5, the lever 15 is not connected directly by the link-bolts 6, but by the pivoted rod 18 with the link 7, whereas the lever 15 is provided with a sleeve 19, as on the valve rod 4, when the link, which takes up the position shown in dotted lines in Fig. 5, can be displaced in this manner.

As is evident without further explana- 3 tion, in such a link motion itis necessary to shut off steam before the link 7 can be moved into the position shown in Figs. 2

lever dependent one on the other in such manner, by means of one of the known safety devices, that the link can be moved only after the steam has been shut off.

I claim 1. In locomotive valve gear of the character described, the combination, 0]": a main link, a slide valve rod, a system of pivot-allyconnected rods connected with the main link, a pivotally-suspended auxiliary link having one end connected to the system of rods, a guide block movable in the auxiliary link and connected with the slide valve rod, and means for raising and lowering the auxiliary link.

2. In locomotive Valve gear of the character described, the combination of a main link, a slide valve rod, a system of pivotally connected rods connected with the main link, an auxiliary link having one end connected to the system of rods, a guide block movable in the auxiliary link and connected with the Valve rod, a laterally suspended lever pivotally carrying the auxiliary link, and man- 1 ually-operated means for rocking said lever. and 4, because otherwise the steam could; escape at once through the exhaust port of the valve chest. Consequently, it is preferable to make the throttle lever and the reversing In testimony whereof, I afiix my signature in the presence of two witnesses.

AURELIJUSZ J ENDRUSIK. Witnesses:

CYRIL TREDNIOK, THOMAS MILS.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Yatents,

Washington, 29. C. 

